---Ithinkit'sgoingtobeabigproblem.---Yes,itcouldbe.---I...

问题详情：

--- I think it's going to be a big problem.

--- Yes, it could be.

--- I wonder          we can do about it.

A. if                        B. how

C. what                     D. that

【回答】

C

知识点：名词

题型：选择题